Sixteenth Basket of Mantaos

Imagine being forced to live, after death, as incorporeal bodies trapped in a vast space of nothingness for thousands of years, with nothing to do but exchanging past memories with other cohabitants (read: weirdos).  Everybody wanted out, but there was no way to leave the Void... 
Until one day, a young man was finally summoned, as a powerful but reluctant mentor, by a bubbly and motivated but completely naive young girl. Baiyi, finally out of the Void, was the only one who could save all of the other 32 souls from their prison and his summoner might just be The Key to their freedom.
However, Baiyi had to use the techniques and abilities the other souls had taught him throughout the years, and together with his own extensive knowledge of anime and game tropes from his shady and dangerous past as an otaku, to face the biggest challenge of them all: training the clumsy young girl he was forced to partner up with… into a competent sorcerer!

EndlessFantasy Translation 

Why Did You Summon Me？

<p>It seemed that the Godsfall cult had not truly unleashed the innate power of an Empire Runic Complex, and that certainly was splendid news, because it meant that they were not as adept in this as the Ancient Rohserlian Empire once was.</p>

<p>Nevertheless, since the cult was able to successfully erect a gigantic, dome-shaped barrier all over a large city—despite Baiyi destroying one of their Complex's key points and informing the Church's authority about the situation—it was fitting to conclude that the Church's incompetence was as legendary as a slacker in a university assignment team.</p>

The Benevolence of the Church